When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 0.76 g of MgCl2(s) are dissolved in 105.70 g of water, the temperature of the solution increases from 24.28 to 27.28 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.61 J/°C. Based on the student's observation, calculate the enthalpy of dissolution of MgCl2(s) in kJ/mol. Assume the specific heat of the solution is equal to the specific heat of water. ΔΗ, 1dissolution kJ/mol
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 0.76 g of MgCl2(s) are dissolved in 105.70 g of water, the temperature of the solution increases from 24.28 to 27.28 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.61 J/°C. Based on the student's observation, calculate the enthalpy of dissolution of MgCl2(s) in kJ/mol. Assume the specific heat of the solution is equal to the specific heat of water. ΔΗ, 1dissolution kJ/mol
Chapter10: Energy
Section: Chapter Questions
Problem 65A
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![[Review Topics]
[References]
Use the References to access important values if needed for this question.
When a solid dissolves in water, heat may be evolved or absorbed. The heat of
dissolution (dissolving) can be determined using a coffee cup calorimeter.
Thermometer
Cardboard or
In the laboratory a general chemistry student finds that when 0.76 g of MgCl2(s)
- Styrofoam lid
are dissolved in 105.70 g of water, the temperature of the solution increases from
24.28 to 27.28 °C.
The heat capacity of the calorimeter (sometimes referred to as the calorimeter
constant) was determined in a separate experiment to be 1.61 J/°C.
Nested
Styrofoam cups
Based on the student's observation, calculate the enthalpy of dissolution of
MgCl2(s) in kJ/mol.
- Reaction
occurs in
Assume the specific heat of the solution is equal to the specific heat of water.
solution.
AHdissolution
kJ/mol
Bokc Cangage Lang
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Transcribed Image Text:[Review Topics]
[References]
Use the References to access important values if needed for this question.
When a solid dissolves in water, heat may be evolved or absorbed. The heat of
dissolution (dissolving) can be determined using a coffee cup calorimeter.
Thermometer
Cardboard or
In the laboratory a general chemistry student finds that when 0.76 g of MgCl2(s)
- Styrofoam lid
are dissolved in 105.70 g of water, the temperature of the solution increases from
24.28 to 27.28 °C.
The heat capacity of the calorimeter (sometimes referred to as the calorimeter
constant) was determined in a separate experiment to be 1.61 J/°C.
Nested
Styrofoam cups
Based on the student's observation, calculate the enthalpy of dissolution of
MgCl2(s) in kJ/mol.
- Reaction
occurs in
Assume the specific heat of the solution is equal to the specific heat of water.
solution.
AHdissolution
kJ/mol
Bokc Cangage Lang
Submit Answer
Retry Entire Group
9 more group attempts remaining
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